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@nimh gisten etnt @frn WALDO E. HASKINS, OF NEW YORK, N. Y.

Letters Patent No. 67,111, dated Jztly 23,1867..

ENVELOPE.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, VALDO E. HASKINS, of the city, county, and State otNew York, have invented a new and useful improvement in Envelopes; and Ldo hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 represents the plan of the pattern in which the paper is cut for making a box-envelope.

Figure 2 is.thc front side view of a box-envelope with the lap partly open showing my improved doublefolded corners.

Figure 3 is tt partial perspective view of the same improvement .in another aspect.

Similar letters of reference indicate like parts.

This invention relates to an improvement in the construction ot' box-envelopes for the purpose of closing the corners under the iiaps and rendering them more serviceable for preserving documents andvpapers of all kinds, both as files and for remittance in the mails. i

As box-envelopes are generally constructed the corners under the flaps are apt to ilure open and expose the contents so that they may be easily abstracted or lost, or thc dust, when tiled, may enter and soil the papers. This improvement obviates these diiculties and makes the envelope more serviceable by strengthening the hinge or fold of the flaps where the wear and liability to injury are greatest. It consists in forming inward projections which connect the flap with the upper corners or ends of the box-envelopes, connecting the body andthe ap of the envelope in such manner that when the flap is folded down the projections fold down inwardly and close the corners of the box perfectly, by which moans the papers enclosed cannot be got at from the outside, nor can dust enter the envelope.

In g. 1, which represents the pattern of a box-envelope as the paper is out and creased before folding and pasting together to form it, A is the flap, B is the back, and C the top part. The. other parts and divisions for4 folding and creasing are well understood and require no special explanation. My improvement is in the projections D D formed at the upper corners between the lap A and the end pieces E E, which form the ends of the box. These corner .pieces are made in the cutting of the pattern of the envelope by leaving the material whole within the exterior lines a 'b c, connecting the flap A and the end pieces E E, and creasing the corners thus formed in the usual way for folding on the lines a d, b d, and d c. It will be observed that the corners D D are thus made as wide on the lin'es a d and d c as the end pieces E E, or as that part of the Hap formed by doubling over in the creases a a and d d, so that when the iiap A is shut the ends of the lflap and the ends of tho box itself are thus folded over inwardly together, forming a close corner, as shown in figs. 2 and 3. The projections D D may be made square or of trapezoidal form.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent- The trapezoidal projections D D of the box-envelope, between the iap A, ends E E, and the upper corners of the point B, folded in the medium line I) d, and lines a cl and d e, whereby the corners of the envelope are completely closed, substantially as described for the purpose specied.

The above specification of my invention signed by me this clay of October, 1866.

WALDO E. HASKINS.

Witnesses:

ALEX. F. ROBERTS, J. M. COVINGTON. 

